168 NEW YORK STATE MUSEUM 



lunulicardium Miinster 

 Lunulicardium fragile Hall 

 PI. 9, fig. 18, 19 



Pal. N. Y. vol. 5, pt 1, p. 434, pi. 71 



A large, nearly perfect shell of this species was found in bed 

 VII. It differs from the type in the greater development of the 

 posterior expansion of the shell, a feature which is also charac- 

 teristic of the majority of the specimens in the lower shales, but 

 shells of the normal form are associated with these. 



ACTINOPTERIA Hall 



Actinopteria muricata Hall 



Pal. N. Y. vol. 5, pt 1, p. 108, pi. 17 



This species is represented in beds VI and VII by small casts 

 of the left valve. They show the character of the surface mark- 

 ings and the form of the shell. The marginal spines are not pre- 

 served. 



PTERIN OPECTEN Hall 



Pterinopecten exfoliatus Hall 



Pal. N. Y. vol. 5, pt 1, p. 61, pi. 1, 83 



Shells of this species are small, the largest found being only 

 10 mm high and 12 mm long. A part of the shell is retained and 

 shows the surface markings. Only a few specimens have been 

 found. 



CYPRICARDINIA Hall 



Cypricardinia indenta (Conrad) 



Pal. N. Y. vol. 5, pt 1, p. 485, pi. 79 



This is the most abundant species in bed VI. Some of the 

 specimens retain parts of the shell, and the concentric lamellae 

 are strongly marked on all of them, but only one shows faint 

 traces of the fine radiating striae. 



